//
// DotNetNuke - http://www.dotnetnuke.com
// Copyright (c) 2002-2010
// by Perpetual Motion Interactive Systems Inc. ( http://www.perpetualmotion.ca )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and 
// to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions 
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
//

using System.IO;
using System.IO.Compression;
namespace DotNetNuke.HttpModules.Compression
{
	public class GZipFilter : CompressingFilter
	{
		private GZipStream m_stream = null;
		public GZipFilter(Stream baseStream)
			: base(baseStream)
		{
			m_stream = new GZipStream(baseStream, CompressionMode.Compress);
		}
		public override void Write(byte[] buffer, int offset, int count)
		{
			if (!HasWrittenHeaders) {
				WriteHeaders();
			}
			m_stream.Write(buffer, offset, count);
		}
		public override string ContentEncoding {
			get { return "gzip"; }
		}
		public override void Close()
		{
			m_stream.Close();
		}
		public override void Flush()
		{
			m_stream.Flush();
		}
	}
}
